End cover assembly, battery and electric equipment

Abstract

The utility model discloses an end cover assembly, a battery and electric equipment, the end cover assembly is used for the battery, and the end cover assembly comprises an end cover and a sealing element; the sealing piece is arranged on at least part of the edge of the end cover and is suitable for deforming when the air pressure is larger than a first preset value. When the air pressure is greater than a first preset value, the gas applies gas pressure to the end cover assembly, and the sealing element is stressed to deform, so that a gap or separation is generated between the sealing element and the shell of the battery, the interior of the battery is communicated with the outside, the gas and pressure in the battery are released, and the pressure release of the battery is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an end cover component, a battery and an electrical device. Background Art

[0002] When the battery is in use, gas is generated inside the battery, which increases the pressure inside the battery. To avoid continuous accumulation of heat and gas inside the battery, the battery needs to be depressurized. Utility Model Content

[0003] The utility model aims to provide an end cover assembly, a battery and an electrical device to solve the problem that the battery needs to release pressure.

[0004] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0005] In a first aspect, the utility model provides an end cap assembly for a battery, comprising:

[0006] End caps;

[0007] A sealing member is arranged on at least a portion of the edge of the end cover, and the sealing member is suitable for deforming when the air pressure is greater than a first preset value.

[0008] In one embodiment, the sealing member is annular and is sleeved around the edges of the end cover.

[0009] In one embodiment, the sealing member includes a main body, a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion are arranged relatively spaced apart, the main body connects the first clamping portion and the second clamping portion, the main body, the first clamping portion and the second clamping portion together form a receiving cavity, and the four edges of the end cover are received in the receiving cavity.

[0010] In one embodiment, the end cover includes a base plate and a plug-in portion, wherein the plug-in portion is connected to the base plate on all sides, the plug-in portion is received in the receiving cavity, and the thickness of the base plate is greater than the thickness of the plug-in portion.

[0011] In one embodiment, the plug-in portion is in close contact with the inner wall surface of the receiving cavity.

[0012] In one embodiment, the end cover assembly further includes an explosion-proof valve, the end cover is provided with a mounting hole, the explosion-proof valve closes the mounting hole and is suitable for opening when the air pressure is greater than a second preset value, and the second preset value is less than the first preset value.

[0013] In a second aspect, the utility model provides a battery, comprising a battery cell, a shell and an end cap assembly described in any one of the various embodiments of the first aspect, wherein the shell encloses a receiving space, the battery cell is received in the receiving space, the receiving space is connected to an opening of the shell, and the end cap assembly is arranged at the opening of the shell.

[0014] In one embodiment, an end surface of the substrate of the end cover facing the battery cell is flush with an end surface of the sealing member facing the battery cell.

[0015] In one embodiment, the shell includes an opening section, the sealing member includes a main body, and a surface of the sealing member on one side close to an inner wall surface of the opening section is at least partially disposed in close contact with the inner wall surface of the opening section.

[0016] In one embodiment, the sealing member includes a main body, a first clip part and a second clip part, the first clip part and the second clip part are arranged relatively spaced apart, the main body connects the first clip part and the second clip part, the main body, the first clip part and the second clip part are enclosed to form a receiving cavity, the four edges of the end cover are received in the receiving cavity, the first clip part is connected to the surface of the end cover facing the battery cell, the second clip part is connected to the surface of the end cover away from the battery cell, the surface of the main body facing away from the end cover has a first surface, and the inner wall surface of the opening section is in close contact with the first surface.

[0017] In one embodiment, the shell further includes a limiting member, which is connected to one end of the opening section away from the battery cell and is located on a side surface of the end cover assembly away from the battery cell, and the limiting member is suitable for limiting the end cover assembly in the thickness direction of the end cover, and the limiting member is deformed when the air pressure inside the battery is greater than the first preset value.

[0018] In one embodiment, the limiting member extends to the second clamping portion and is connected to a surface of the second clamping portion facing away from the end cover.

[0019] In one embodiment, there are a plurality of the limiting members, and the plurality of limiting members are spaced apart and arranged at an end of the opening section away from the battery core.

[0020] In one embodiment, the shell further includes a support section, which is connected to one end of the opening section close to the battery cell, and extends toward the interior of the accommodating space, and is in close contact with at least part of the end surface of the seal close to the battery cell.

[0021] In a third aspect, the utility model provides an electrical device, comprising an electrical device and a battery as described in any one of various embodiments of the second aspect, wherein the battery supplies power to the electrical device.

[0022] The end cap assembly of the utility model is provided with a seal that is sleeved on at least part of the edge of the end cap, and the surface of the seal that faces away from the end cap in the battery is also in contact with the shell, thereby fixing the end cap and sealing the shell. When the gas pressure inside the battery is greater than a first preset value, the gas applies gas pressure to the end cap assembly, the seal is deformed by the force, and the end cap is subjected to gas pressure in a direction away from the battery cell, so that a gap or separation is generated between the seal and the shell of the battery, so that the interior of the battery is connected to the outside world, the gas and pressure inside the battery are released, the battery is depressurized, and the risk of battery fire and explosion is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a perspective view of a battery of an embodiment;

[0025] Figure 2 is a cross-sectional view of a battery of an embodiment;

[0026] Figure 3 is a partial cross-sectional view of a battery of an embodiment;

[0027] Figure 4 is a partial cross-sectional view of a battery according to another embodiment.

[0028] Description of reference numerals:

[0029] 100-battery, 10-end cover assembly, 11-end cover, 111-substrate, 112-plug-in portion, 113-transition surface, 12-seal, 121-main body, 1211-first surface, 1212-second surface, 1213-third surface, 122-first clamping portion, 123-second clamping portion, 124-guide surface, 13-explosion-proof valve, 131-protective sheet, 132-bursting sheet, 14-sealing nail, 15-liquid injection hole cover, 20-housing, 21-opening section, 22-limiting member, 23-supporting section, 30-battery cell. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0032] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0033] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] For reference Figure 1 , Figure 2 and Figure 3 The utility model provides an end cap assembly 10, which is used for a battery 100, and includes an end cap 11 and a seal 12. The seal 12 is disposed on at least a portion of the edge of the end cap 11, and the seal 12 is adapted to deform when the air pressure is greater than a first preset value.

[0035] The end cover 11 is made of a material with high structural strength, and specifically may be a metal material, such as aluminum, aluminum alloy, magnesium alloy, steel, steel alloy, iron, and iron alloy.

[0036] The sealing member 12 is made of a material with certain elasticity and strength, and may be plastic, rubber, etc. The rubber may be nitrile rubber, acrylic rubber, fluororubber, fluorosilicone rubber, perfluororubber, etc., without limitation.

[0037] In one embodiment, the sealing member 12 is annular and is sleeved around the edges of the end cover 11. Optionally, the sealing member 12 is annular and connected end to end.

[0038] The annular sealing member 12 is sleeved around the edges of the end cover 11 to improve the sealing performance of the end cover assembly 10 .

[0039] The end cover assembly 10 of the utility model is provided with a seal 12 which is sleeved on at least part of the edge of the end cover 11, and the surface of the seal 12 facing away from the end cover 11 abuts against the inner wall of the shell 20, thereby fixing the end cover 11 and sealing the shell 20. When the gas pressure inside the battery 100 is greater than a first preset value, the gas applies gas pressure to the end cover assembly 10, and the seal 12 is deformed by the force. The end cover 11 is subjected to the gas pressure in the direction away from the battery cell 30, so that a gap or separation is generated between the seal 12 and the shell 20 of the battery 100, so that the interior of the battery 100 is connected with the outside world, the pressure inside the battery 100 is released, the battery 100 completes pressure relief, and the risk of fire and explosion of the battery 100 is reduced.

[0040] For reference Figure 2 and Figure 3 In one embodiment, the sealing member 12 includes a main body 121, a first clamping portion 122 and a second clamping portion 123, the first clamping portion 122 and the second clamping portion 123 are arranged relatively spaced apart, the main body 121 connects the first clamping portion 122 and the second clamping portion 123, the main body 121, the first clamping portion 122 and the second clamping portion 123 are enclosed to form a receiving cavity, and the edges around the end cover 11 are received in the receiving cavity.

[0041] The bottom wall of the receiving cavity can be rectangular, circular, elliptical, etc., without limitation. The inner wall surfaces of the receiving cavity can be smoothly transitioned or directly transitioned, without limitation.

[0042] The sizes of the first clamping portion 122 and the second clamping portion 123 in the axial direction of the battery 100 may be consistent or inconsistent, without limitation.

[0043] The receiving cavity is provided to receive the edges around the end cover 11 , thereby strengthening the limiting effect on the end cover 11 .

[0044] For reference Figure 3 In one embodiment, the end cover 11 includes a substrate 111 and a plug-in portion 112 , the plug-in portion 112 is connected to the substrate 111 on all sides, the plug-in portion 112 is received in the receiving cavity, and the thickness of the substrate 111 is greater than the thickness of the plug-in portion 112 .

[0045] Optionally, the receiving cavity is formed by inserting the plug-in portion 112 into the sealing member 12, or the sealing member 12 pre-forms the receiving cavity, and the plug-in portion 112 is then inserted into the receiving cavity.

[0046] Optionally, the end cover 11 also includes a transition surface 113, one end of the transition surface 113 is connected to the plug-in portion 112, and the other end is connected to the base plate 111. The transition surface 113 has an angle with the axial direction of the battery 100, and the transition section plays a guiding role in the process of the plug-in portion 112 entering the receiving cavity. The transition surface 113 can abut against the first clamping portion 122 and / or the second clamping portion 123, or there can be a gap with the first clamping portion 122 and / or the second clamping portion 123, without limitation. If the transition surface 113 abuts against the first clamping portion 122 and / or the second clamping portion 123, a guide surface 124 is correspondingly provided to the abutment of the first clamping portion 122 and / or the second clamping portion 123, and the guide surface 124 is in close contact with the transition surface 113.

[0047] The thickness of the substrate 111 is greater than that of the plug-in portion 112, which can reduce the thickness of the seal 12 on the one hand, and reduce the weight of the end cover 11 on the other hand, thereby achieving lightweight battery 100. The reduced thickness of the plug-in portion 112 also facilitates the plug-in portion 112 to extend into the receiving cavity.

[0048] In one embodiment, the plug-in portion 112 is in close contact with the inner wall of the receiving cavity, which helps to improve the structural stability of the battery 100 and prevent the seal 12 from deforming after slight pressure, thereby affecting the sealing of the battery 100.

[0049] For reference Figure 1 and Figure 2 In one embodiment, the end cover assembly 10 further includes an explosion-proof valve 13. The end cover 11 is provided with a mounting hole. The explosion-proof valve 13 closes the mounting hole and is adapted to open when the air pressure is greater than a second preset value, and the second preset value is less than the first preset value.

[0050] The explosion-proof valve 13 includes a protective sheet 131 and a bursting sheet 132 which are arranged opposite to each other in the axial direction of the battery 100. The bursting sheet 132 may be a thin metal sheet, the metal material may be aluminum, and a plurality of small holes arranged at intervals may be arranged on the bursting sheet 132. The protective sheet 131 may be a plastic sheet, a metal sheet, etc. The protective sheet 131 is farther away from the battery cell 30 of the battery 100 than the bursting sheet 132, and the protective sheet 131 is suitable for protecting the bursting sheet 132 from the influence of external water vapor, etc. When the air pressure inside the battery 100 is greater than the second preset value, the gas inside the battery 100 breaks through the bursting sheet 132 to complete the pressure relief, and the explosion-proof valve 13 is opened.

[0051] Specifically, when the air pressure inside the battery 100 is less than or equal to the second preset value, the battery 100 does not need to release pressure; when the air pressure inside the battery 100 is greater than the second preset value and less than or equal to the first preset value, the explosion-proof valve 13 is opened, and there is no gap between the end cover assembly 10 and the shell 20; when the air pressure inside the battery 100 is greater than the second preset value, the explosion-proof valve 13 continues to work, at this time the seal 12 is deformed by force, there is a gap between the end cover assembly 10 and the shell 20, the interior of the battery 100 is connected to the outside, and the pressure continues to be released until the end cover assembly 10 is separated from the shell 20, thereby achieving large-area pressure relief. The end cover assembly 10 of the utility model can achieve gradient pressure relief and increase the safety performance of the battery 100.

[0052] For reference Figure 1 and Figure 2 In one embodiment, a liquid injection hole is further provided on the substrate 111, and the end cover assembly 10 further includes a sealing pin 14 and a liquid injection hole cover 15, the sealing pin 14 closes the liquid injection hole, the liquid injection hole cover 15 covers the sealing pin 14, and the liquid injection hole cover 15 is connected to the substrate 111. The liquid injection hole cover 15 and the substrate 111 can be connected by welding, clamping, bonding, etc. The material of the liquid injection hole cover 15 can be metal, etc. Specifically, the metal material can be aluminum alloy, stainless steel, etc. The shape of the liquid injection hole can be circular, oval, rectangular, etc., without limitation. The shape of the sealing pin 14 is set corresponding to the liquid injection hole. The material of the sealing pin 14 can be rubber, silicone, tetrachloroethylene (PTEE), metal material, etc., and the metal material can be stainless steel, aluminum, etc., without limitation. Specifically, the battery cell 30 is accommodated in the housing 20 ; the electrolyte is injected into the housing 20 from the injection hole of the substrate 111 ; after the injection is completed, the injection hole is sealed with a sealing nail 14 ; the injection hole cover 15 is welded to the end cover 11 and the substrate 111 .

[0053] For reference Figure 1 and Figure 2 The utility model provides a battery 100, which includes a battery cell 30, a shell 20 and an end cap assembly 10 described in any of the aforementioned various embodiments. The shell 20 encloses a receiving space, and the battery cell 30 is received in the receiving space. The receiving space is connected to the opening of the shell 20, and the end cap assembly 10 is arranged at the opening of the shell 20.

[0054] The housing 20 may be in a cylindrical shape, and the corresponding battery 100 is a cylindrical battery 100 .

[0055] The battery cell 30 includes a stacked positive electrode sheet, a separator, and a negative electrode sheet, which are wound and accommodated in the housing 20 .

[0056] The housing 20 is made of a material with relatively high structural strength, and specifically may be a metal material, high-strength plastic, ceramic, etc. The metal material may be aluminum, aluminum alloy, magnesium alloy, iron, iron alloy, etc.

[0057] Optionally, the shell 20 has a single opening, and the end cover assembly 10 is disposed at the opening of the shell 20 .

[0058] Optionally, the shell 20 has double openings, and there can be only one end cover assembly 10, which is arranged at one of the openings of the shell 20, and a bottom cover is arranged at the other opening, and the bottom cover closes the other opening; or, the battery 100 is provided with two end cover assemblies 10, and the two end cover assemblies 10 are arranged corresponding to the two openings, and the explosion-proof valve 13 can be arranged on any end cover assembly 10, or both end cover assemblies 10 can be provided with explosion-proof valves 13.

[0059] The battery 100 of the utility model is provided with a seal 12 which is sleeved on at least part of the edge of the end cover 11, and the surface of the seal 12 facing away from the end cover 11 abuts against the inner wall of the shell 20, thereby fixing the end cover 11 and sealing the shell 20. When the gas pressure inside the battery 100 is greater than a first preset value, the gas applies gas pressure to the end cover assembly 10, and the seal 12 is deformed by the force. The end cover 11 is subjected to the gas pressure in the direction away from the battery cell 30, so that a gap or separation is generated between the seal 12 and the shell 20 of the battery 100, so that the interior of the battery 100 is connected with the outside world, the pressure inside the battery 100 is released, and the battery 100 completes the pressure release to reduce the risk of fire and explosion of the battery 100.

[0060] In one embodiment, the end surface of the substrate 111 facing the battery cell 30 is flush with the end surface of the seal 12 facing the battery cell 30. The end surface of the substrate 111 facing the battery cell 30 is flush with the end surface of the seal 12 facing the battery cell 30, and the thickness of the plug-in portion 112 is less than the thickness of the substrate 111. On the one hand, it shows that the provision of the substrate 111 and the plug-in portion 112 reduces the amount of the end cover 11, which is conducive to reducing production costs. On the other hand, the flushness of the two facilitates the assembly of the battery 100.

[0061] For reference Figure 3 In one embodiment, the housing 20 includes an opening section 21, and a surface of the sealing member 12 on one side close to the inner wall of the opening section 21 is at least partially in close contact with the inner wall of the opening section 21. At least a portion of the inner wall between the sealing member 12 and the opening section 21 is in close contact, so that there is friction between the sealing member 12 and the opening section 21, which is conducive to improving the sealing performance of the sealing member 12 and is not prone to leakage.

[0062] For reference Figure 3The sealing member 12 includes a main body 121, a first clamping portion 122 and a second clamping portion 123, the first clamping portion 122 and the second clamping portion 123 are arranged relatively spaced apart, the main body 121 connects the first clamping portion 122 and the second clamping portion 123, the main body 121, the first clamping portion 122 and the second clamping portion 123 are enclosed to form a receiving cavity, the edges of the end cover 11 are received in the receiving cavity, the first clamping portion 122 is connected to the surface of the end cover 11 facing the battery cell 30, the second clamping portion 123 is connected to the surface of the end cover 11 away from the battery cell 30, the surface of the main body 121 facing away from the end cover 11 is the first surface 1211, and the inner wall surface of the opening section 21 is in close contact with the first surface 1211.

[0063] For reference Figure 3 In one embodiment, the surface of the main body 121 facing away from the end cover 11 is a first surface 1211, and the first surface 1211 is suitable for being in close contact with the inner wall surface of the shell 20. The first surface 1211 is any one or a combination of a plane, a concave surface and a convex surface.

[0064] Optionally, the first surface 1211 may be a combination of a plane and a concave surface, wherein the middle area of ​​the first surface 1211 is a concave surface and the two end areas are planes, or the first surface 1211 is a concave surface as a whole, or the middle area of ​​the first surface 1211 is a convex surface and the two end areas are planes, without limitation.

[0065] In one embodiment, the main body 121 further includes a second surface 1212 and a third surface 1213 disposed opposite to each other, the two ends of the first surface 1211 are connected to the second surface 1212 and the third surface 1213 respectively, the second surface 1212 is connected to the first clamping portion 122, the third surface 1213 is connected to the second clamping portion 123, and the first clamping portion 122 is closer to the battery cell 30 of the battery 100 than the second clamping portion 123. Optionally, the end surface of the seal 12 facing the battery cell 30 includes at least a portion of the second surface 1212.

[0066] The distance between the second surface 1212 and the third surface 1213 in the axial direction of the battery 100 is d, which satisfies: 4mm≤d≤10mm. The dimension of the first clamping portion 122 in the axial direction of the battery 100 is d1, and the dimension of the second clamping portion 123 in the axial direction of the battery 100 is d2, which satisfies: d1<d, d2<d. Optionally, d is 4mm, 6mm, 8mm, 10mm, etc., without limitation. When d<4mm, the thickness of the main body 121, the first clamping portion 122 and the second clamping portion 123 is small, and the sealing and limiting effects on the end cover 11 are poor; when d>10mm, the force required for the deformation of the seal 12 is large, and the corresponding first preset value is large, which may affect the safety of the battery 100; when 4mm≤d≤10mm, the seal 12 achieves the sealing and limiting effects while also keeping the first preset value within a suitable range.

[0067] The first surface 1211 is in close contact with the inner wall of the shell 20, which increases the contact area between the first surface 1211 and the shell 20, enhances the sealing effect between the seal 12 and the shell 20, and avoids deformation and failure of the seal 12 when the pressure inside the battery 100 is low.

[0068] The inner wall surface of the opening section 21 is arranged corresponding to the first surface 1211 . Optionally, the first surface 1211 is a concave surface, and the corresponding inner wall surface of the opening section 21 is a convex surface.

[0069] The way the battery 100 is assembled determines the shape of the inner wall surface of the opening section 21. Specifically, when the battery 100 is assembled, mechanical pressing is performed on the opening section 21 so that the shell 20 is deformed and closed, that is, the opening section 21 squeezes the seal 12, and the inner wall surface of the receiving cavity of the seal 12 is tightly attached to the plug-in portion 112 of the end cover 11, thereby achieving a closed seal.

[0070] For reference Figure 3 and Figure 4 In one embodiment, the shell 20 also includes a limiter 22, which is connected to the end of the opening section 21 away from the battery cell 30 and is located on the side surface of the end cover assembly 10 away from the battery cell 30. The limiter 22 is suitable for limiting the end cover assembly 10 in the thickness direction of the end cover 11, and the limiter 22 is deformed when the air pressure inside the battery 100 is greater than a first preset value.

[0071] The limit member 22 and the opening section 21 may be an integrated structure, that is, an integrated structure prepared by an integrated process, and the integrated process may specifically be stamping, forging, etc. The limit member 22 and the opening section 21 may also be a split structure, and the connection method between the limit member 22 and the opening section 21 may be welding, bonding, etc., without limitation.

[0072] There can be one or more limit members 22. Optionally, when there is one limit member 22, the limit member 22 can be annular, connected in the first position, or arranged at intervals in the first position.

[0073] Specifically, Figure 3 The battery 100 in FIG. 1 is an assembled battery 100. Figure 4 The battery 100 in FIG. 1 is the battery 100 before mechanical engagement. Figure 4 Before the battery 100 is assembled, the stopper 22 extends along the axial direction of the battery 100; Figure 3During the assembly process of the battery 100, the force of the limiter 22 is changed from extending along the axial direction of the battery 100 to extending along the inside of the receiving space by mechanical engagement. The limiter 22 and the end cover assembly 10 together form a buckle shape to limit the end cover assembly 10 in the axial direction of the battery 100; when the air pressure inside the battery 100 is greater than the second preset value, the seal 12 is deformed by force and squeezes the limiter 22 at the same time, so that the buckle structure of the limiter 22 and the end cover assembly 10 is deformed, and the clamping and limiting function is lost. The end cover 11 and the seal 12 are separated from the shell 20 to achieve large-area pressure relief.

[0074] For reference Figure 3 In one embodiment, the limiting member 22 extends to the second clamping portion 123 and is connected to a surface of the second clamping portion 123 facing away from the end cover 11 .

[0075] Specifically, the limiting member 22 is also connected to the third surface 1213 of the main body 121 , and the third surface 1213 is connected to the second clamping portion 123 .

[0076] The limiting member 22 extends to the second clamping portion 123 and is connected to the surface of the second clamping portion 123 away from the end cover 11 , which is beneficial to improving the limiting effect of the limiting member 22 on the sealing member 12 .

[0077] For reference Figure 1 In one embodiment, there are multiple limiters 22, and the multiple limiters 22 are spaced apart at one end of the opening section 21 away from the battery cell 30. Optionally, the multiple limiters 22 are equally spaced in the circumferential direction of the battery 100. The equally spaced arrangement can avoid local deformation.

[0078] The limit members 22 can change the size of the second preset value. If the limit members 22 are arranged too densely and the second preset value is too large, the seal 12 cannot be separated from the shell 20 and pressure relief cannot be achieved. If the intervals between the limit members 22 are too large, the limit member 22 has a weak limiting effect on the seal 12, and the difference between the first preset value and the second preset value is not obvious, then the effect of gradient pressure relief is not obvious.

[0079] For reference Figure 3 and Figure 4 In one embodiment, the shell 20 also includes a support section 23, which is connected to one end of the opening section 21 close to the battery cell 30, and extends toward the interior of the accommodating space. The support section 23 is in close contact with at least part of the end surface of the seal 12 close to the battery cell 30.

[0080] The support section 23 is also flush with the end surface of the substrate 111 close to the battery cell 30. The support section 23 is provided to facilitate the installation of the seal 12 and the end cover 11, and also to prevent the seal 12 or the end cover 11 from falling into the interior of the battery 100 when separated from the housing 20, thereby affecting the subsequent operation of the battery 100.

[0081] The utility model provides an electric device, including an electric device and a battery 100 as described in any of the above various embodiments, the battery 100 supplies power to the electric device. The electric device may be a washing machine, a television, etc., and the electric device may be a transformer, a light bulb, etc., without limitation.

[0082] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0083] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. An end cap assembly for a battery, characterized in that: include: End caps; A sealing member is arranged on at least a portion of the edge of the end cover, and the sealing member is suitable for deforming when the air pressure is greater than a first preset value.

2. The end cap assembly according to claim 1, characterized in that: The sealing member is annular and is sleeved on the edges around the end cover.

3. The end cap assembly according to claim 2, characterized in that: The sealing member includes a main body, a first clamping portion and a second clamping portion, wherein the first clamping portion and the second clamping portion are arranged relatively spaced apart, the main body connects the first clamping portion and the second clamping portion, the main body, the first clamping portion and the second clamping portion enclose a receiving cavity, and the four edges of the end cover are received in the receiving cavity.

4. The end cap assembly according to claim 3, characterized in that: The end cover comprises a base plate and a plug-in portion, wherein the plug-in portion is connected to the base plate on all sides and is received in the receiving cavity, and the thickness of the base plate is greater than the thickness of the plug-in portion.

5. The end cap assembly according to claim 4, characterized in that: The plug-in portion is in close contact with the inner wall surface of the receiving cavity.

6. The end cap assembly according to claim 1, characterized in that: The end cover assembly also includes an explosion-proof valve. The end cover is provided with a mounting hole. The explosion-proof valve closes the mounting hole and is suitable for opening when the air pressure is greater than a second preset value, and the second preset value is less than the first preset value.

7. A battery, characterized in that: It comprises a battery cell, a shell and an end cap assembly as described in any one of claims 1 to 6, wherein the shell encloses a receiving space, the battery cell is received in the receiving space, the receiving space is connected to an opening of the shell, and the end cap assembly is arranged at the opening of the shell.

8. The battery according to claim 7, characterized in that An end surface of the substrate of the end cover facing the battery cell is flush with an end surface of the sealing member facing the battery cell.

9. The battery according to claim 7, characterized in that The shell comprises an opening section, and a side surface of the sealing member close to an inner wall surface of the opening section is at least partially arranged in close contact with the inner wall surface of the opening section.

10. The battery according to claim 9, characterized in that The sealing component includes a main body, a first clamping part and a second clamping part, the first clamping part and the second clamping part are arranged relatively spaced apart, the main body connects the first clamping part and the second clamping part, the main body, the first clamping part and the second clamping part are enclosed to form a receiving cavity, the four edges of the end cover are received in the receiving cavity, the first clamping part is connected to the surface of the end cover facing the battery cell, the second clamping part is connected to the surface of the end cover away from the battery cell, the surface of the main body facing away from the end cover is the first surface, and the inner wall surface of the opening section is in close contact with the first surface.

11. The battery according to claim 10, characterized in that The shell also includes a limiting member, which is connected to one end of the opening section away from the battery cell and is located on a side surface of the end cover assembly away from the battery cell. The limiting member is suitable for limiting the end cover assembly in the thickness direction of the end cover, and the limiting member is deformed when the air pressure inside the battery is greater than the first preset value.

12. The battery according to claim 11, characterized in that The limiting member extends to the second clamping portion and is connected to a surface of the second clamping portion which is away from the end cover.

13. The battery according to claim 11, characterized in that There are a plurality of the limiting members, and the plurality of the limiting members are arranged at intervals at an end of the opening section away from the battery core.

14. The battery according to claim 9, characterized in that The shell also includes a support section, which is connected to one end of the opening section close to the battery cell, extends toward the interior of the accommodating space, and is in close contact with at least part of the end surface of the seal close to the battery cell.

15. An electrical equipment, characterized in that: The invention comprises an electric device and a battery as claimed in any one of claims 7 to 14, wherein the battery supplies power to the electric device.

Images